374 struct gpio_chip {  struct
380 	int			(*request)(struct gpio_chip *gc,  argument
382 	void			(*free)(struct gpio_chip *gc,  argument
384 	int			(*get_direction)(struct gpio_chip *gc,  argument
386 	int			(*direction_input)(struct gpio_chip *gc,  argument
388 	int			(*direction_output)(struct gpio_chip *gc,  argument
390 	int			(*get)(struct gpio_chip *gc,  argument
392 	int			(*get_multiple)(struct gpio_chip *gc,  argument
395 	void			(*set)(struct gpio_chip *gc,  argument
397 	void			(*set_multiple)(struct gpio_chip *gc,  argument
400 	int			(*set_config)(struct gpio_chip *gc,  argument
403 	int			(*to_irq)(struct gpio_chip *gc,  argument
407 						struct gpio_chip *gc);  argument
409 	int			(*init_valid_mask)(struct gpio_chip *gc,  argument
413 	int			(*add_pin_ranges)(struct gpio_chip *gc);  argument
415 	int			base;
416 	u16			ngpio;
417 	u16			offset;
418 	const char		*const *names;
419 	bool			can_sleep;
422 	unsigned long (*read_reg)(void __iomem *reg);
423 	void (*write_reg)(void __iomem *reg, unsigned long data);
424 	bool be_bits;
425 	void __iomem *reg_dat;
426 	void __iomem *reg_set;
427 	void __iomem *reg_clr;
428 	void __iomem *reg_dir_out;
429 	void __iomem *reg_dir_in;
430 	bool bgpio_dir_unreadable;
431 	int bgpio_bits;
432 	spinlock_t bgpio_lock;
433 	unsigned long bgpio_data;
434 	unsigned long bgpio_dir;
449 	struct gpio_irq_chip irq;
458 	unsigned long *valid_mask;
486 	int (*of_xlate)(struct gpio_chip *gc,  argument